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Effect of the synthesis method of MgAl2O4 and of Sn and Pb addition to platinum catalysts on the behavior in n - butane dehydrogenation / Sonia Bocanegra in Industrial & engineering chemistry research, Vol. 49 N° 9 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 9 (Mai 2010) . - pp. 4044-4054 Titre : Effect of the synthesis method of MgAl2O4 and of Sn and Pb addition to platinum catalysts on the behavior in n - butane dehydrogenation Type de document : texte imprimé Auteurs : Sonia Bocanegra, Auteur ; Maria Julia Yanez, Auteur ; Osvaldo Scelza, Auteur Année de publication : 2010 Article en page(s) : pp. 4044-4054 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Dehydrogenation  Catalyst Résumé : The MgAl2O4 spinels, synthesized by using two different methods (ceramic and coprecipitation), show very low acidity and good dispersion capacity of the metallic phase, these properties being suitable for the use of these materials as supports. However, MgAl2O4ccr displays higher strong acidity than MgAl2O4cop which seems to influence the metal—support interaction, since Pt/MgAl2O4cer catalyst shows higher metallic dispersion, lower metal particle sizes, and better catalytic behavior than the Pt/MgAl2O4cop one. The Sn addition to Pt/ MgAl2O4 improves the performance in the n-butane dehydrogenation process, increasing the activity, stability, and selectivity to butenes. This behavior is due to the presence of important Pt—Sn interactions, mainly in bimetallic catalysts supported on MgAl2O4cer. On the other hand, the Pb addition to monometallic catalysts does not enhance the catalytic performance in dehydrogenation. This behavior is in agreement with the characterization results of metallic phase that indicate important blocking effects in PtPb/MgAl2O4cer catalysts, and segregation effects in PtPb/MgAl2O4cop. In conclusion, the ceramic method of MgAl2O4 preparation provides the best support for PtSn catalysts in n-butane dehydrogenation reaction. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22732893 [article] Effect of the synthesis method of MgAl2O4 and of Sn and Pb addition to platinum catalysts on the behavior in n - butane dehydrogenation [texte imprimé] / Sonia Bocanegra, Auteur ; Maria Julia Yanez, Auteur ; Osvaldo Scelza, Auteur . - 2010 . - pp. 4044-4054. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 9 (Mai 2010) . - pp. 4044-4054 Mots-clés : Dehydrogenation  Catalyst Résumé : The MgAl2O4 spinels, synthesized by using two different methods (ceramic and coprecipitation), show very low acidity and good dispersion capacity of the metallic phase, these properties being suitable for the use of these materials as supports. However, MgAl2O4ccr displays higher strong acidity than MgAl2O4cop which seems to influence the metal—support interaction, since Pt/MgAl2O4cer catalyst shows higher metallic dispersion, lower metal particle sizes, and better catalytic behavior than the Pt/MgAl2O4cop one. The Sn addition to Pt/ MgAl2O4 improves the performance in the n-butane dehydrogenation process, increasing the activity, stability, and selectivity to butenes. This behavior is due to the presence of important Pt—Sn interactions, mainly in bimetallic catalysts supported on MgAl2O4cer. On the other hand, the Pb addition to monometallic catalysts does not enhance the catalytic performance in dehydrogenation. This behavior is in agreement with the characterization results of metallic phase that indicate important blocking effects in PtPb/MgAl2O4cer catalysts, and segregation effects in PtPb/MgAl2O4cop. In conclusion, the ceramic method of MgAl2O4 preparation provides the best support for PtSn catalysts in n-butane dehydrogenation reaction. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22732893